As a beginner in the world of HTML and CSS, I recently crafted a sleek subscription box that allows users to input their email addresses. Leveraging the power of Ruby and SendGrid, I am now eager to inform subscribers once they hit the 'subscribe' button. Whether it be through a pop-up notification or a simple text message, I'm all ears for suggestions on how to make this happen seamlessly. Your insights would be immensely appreciated! Thank you!